General Janhaugite Information
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Chemical Formula: |
(Na,Ca)3(Mn++,Fe++)3(Ti++++,Zr,Nb)2Si4O15(OH,F,O)3 |
Composition: |
Molecular Weight = 773.35 gm |
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Sodium 8.32 % Na 11.22 % Na2O |
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Calcium 1.04 % Ca 1.45 % CaO |
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Zirconium 4.72 % Zr 6.37 % ZrO2 |
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Titanium 9.29 % Ti 15.49 % TiO2 |
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Manganese 17.05 % Mn 22.01 % MnO |
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Niobium 3.60 % Nb 5.16 % Nb2O5 |
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Iron 4.33 % Fe 5.57 % FeO |
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Silicon 13.80 % Si 29.52 % SiO2 |
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Hydrogen 0.18 % H 1.63 % H2O |
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Oxygen 34.96 % O |
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Fluorine 2.70 % F 2.70 % F |
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- % F -1.14 % -O=F2 |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
Empirical Formula: |
Na2.8Ca0.2Mn2+2.4Fe2+0.6Ti1.5Zr0.4Nb0.3Si3.8O15(OH)1.4F1.1O0.5 |
Environment: |
In groundmass and miarolitic cavities in sodium-rich granite. |
IMA Status: |
Approved IMA 1983 |
Locality: |
From Gjerdingen, 30 km north of Olso, Norway. Link to MinDat.org Location Data. |
Name Origin: |
Named for Jan Haug, and amateur mineralogist who first observed the mineral. |
Synonym: |
ICSD 30900 |
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PDF 35-641 |
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Janhaugite Image |
Images:
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Images:
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Janhaugite Crystallography
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Axial Ratios: |
a:b:c =1.09:1:1.4234 |
Cell Dimensions: |
a = 10.668, b = 9.787, c = 13.931, Z = 4; beta = 107.82° V = 1,384.72 Den(Calc)= 3.71 |
Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/n |
X Ray Diffraction: |
By Intensity(I/Io): 2.839(1), 2.782(0.9), 2.833(0.9), |
Crystal Structure:
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Annehed H , Falth L , Raade G , Neues Jahrbuch fur Mineralogie, Monatshefte , 1985 (1985) p.7-18, The crystal structure of janhaugite, a sorosilicate of the cuspidine family
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Physical Properties of Janhaugite
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Cleavage: |
[010] Distinct |
Color: |
Reddish brown. |
Density: |
3.6 |
Diaphaniety: |
Semitransparent |
Fracture: |
Brittle - Generally displayed by glasses and most non-metallic minerals. |
Habit: |
Anhedral Grains - Granular minerals without the expression of crystal shapes |
Habit: |
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). |
Habit: |
Striated - Parallel lines on crystal surface or cleavage face. |
Hardness: |
5 - Apatite |
Luster: |
Vitreous (Glassy) |
Streak: |
light brown |
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Optical Properties of Janhaugite
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Gladstone-Dale: |
CI meas= 0.01 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.039 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2253,KPDmeas= 0.2322,KC= 0.2346 |
Optical Data: |
Biaxial (+), a=1.77, b=1.828, g=1.91, bire=0.1400, 2V(Calc)=84, 2V(Meas)=80. |
Pleochroism (x): |
colorless. |
Pleochroism (y): |
beige. |
Pleochroism (z): |
beige. |
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Calculated Properties of Janhaugite
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Electron Density: |
relectron=3.46 gm/cc note: rJanhaugite =3.60 gm/cc. |
Fermion Index |
Fermion Index = 0.02484 Boson Index = 0.97516 |
Photoelectric: |
PEJanhaugite = 19.67 barns/electron U=PEJanhaugite x relectron= 68.03 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Janhaugite is Not Radioactive |
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Janhaugite Classification
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Dana Class: |
56.2.4.10 (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O |
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(56.2)with cations in [4] and/or >[4] coordination |
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(56.2.4)Cuspidine - Wohlerite group |
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56.2.4.1 Baghdadite Ca3(Zr,Ti)Si2O9 P 21/a 2/m |
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56.2.4.2 Burpalite Na2CaZrSi2O7F2 P 21/a 2/m |
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56.2.4.3 Cuspidine Ca4Si2O7(F,OH)2 P 21/c 2/m |
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56.2.4.4 Lavenite (Na,Ca)2(Mn,Fe)(Zr,Ti,Nb)Si2O7(O,OH,F) P 21/a 2/m |
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56.2.4.5 Wohlerite NaCa2(Zr,Nb)Si2O7(O,OH,F)2 P 21/m 2/m |
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56.2.4.6 Niocalite Ca14Nb2(Si2O7)4O6F2 Pa m |
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56.2.4.7 Hiortdahlite (Ca,Na,Y)3(Zr,Ti)Si2O7(F,O,OH)2 P1 1 |
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56.2.4.8 Rosenbuschite (Ca,Na)3(Zr,Ti)Si2O8F P1 1 |
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56.2.4.9 Hainite Na4Ca8(Ti,Zr,Mn,Fe)3Si8O28F8 P1 1 |
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56.2.4.10 Janhaugite (Na,Ca)3(Mn,Fe)3(Ti,Zr,Nb)2Si4O15(OH,F,O)3 P 21/n 2/m |
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56.2.4.11 Jennite Ca9Si6O18(OH)6·8H2O P1 1 |
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56.2.4.12 Komarovite (Ca,Mn)2(Nb,Ti)2Si2O7(O,F)2·3.5(H2O) Unk Ortho |
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56.2.4.13 Na-komarovite? Na6CaNb6[Si4O12F2·4(H2O) C mmm 2/m 2/m 2/m |
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56.2.4.14 Suolunite Ca2Si2O5(OH)2·(H2O) F dd2 mm2 |
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56.2.4.15 Mongolite Ca4Nb6Si5O24(OH)10·5(H2O) Unk Tetra |
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56.2.4.16 Kristiansenite! Ca2ScSn(Si2O7)(Si2O6OH) C1 1 |
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56.2.4.17 Kochite! Na2(Na,Ca)4Ca4(Mn,Ca)2Zr2Ti2(Si2O7)4(O,F)4F4 P1 1 |
Strunz Class: |
VIII/C.11-12 VIII - Silicates |
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VIII/C - Sorosilicates with [Si2O7]6-, with anions unfamiliar to tetraheders [O,OH,F] |
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VIII/C.11 - Wöhlerite - Lavenite series |
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VIII/C.11-05 Cuspidine Ca4Si2O7(F,OH)2 P 21/c 2/m |
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VIII/C.11-10 Wohlerite NaCa2(Zr,Nb)Si2O7(O,OH,F)2 P 21/m 2/m |
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VIII/C.11-12 Janhaugite (Na,Ca)3(Mn,Fe)3(Ti,Zr,Nb)2Si4O15(OH,F,O)3 P 21/n 2/m |
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VIII/C.11-15 Normandite! NaCa(Mn,Fe)(Ti,Nb,Zr)Si2O7(O,F)2 P 21/a 2/m |
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VIII/C.11-20 Lavenite (Na,Ca)2(Mn,Fe)(Zr,Ti,Nb)Si2O7(O,OH,F) P 21/a 2/m |
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VIII/C.11-25 Burpalite Na2CaZrSi2O7F2 P 21/a 2/m |
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VIII/C.11-30 Baghdadite Ca3(Zr,Ti)Si2O9 P 21/a 2/m |
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VIII/C.11-40 Niocalite Ca14Nb2(Si2O7)4O6F2 Pa m |
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VIII/C.11-50 Hiortdahlite (Ca,Na,Y)3(Zr,Ti)Si2O7(F,O,OH)2 P1 1 |
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Other Janhaugite Information
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References: |
NAME( AntBidBlaNic2) PHYS. PROP.(AntBidBlaNic2) OPTIC PROP.(AntBidBlaNic2) |
See Also: |
Links to other databases for Janhaugite :
1 -Am. Min. Crystal Structure Database
2 -Athena
3 - EUROmin Project
4 -Google Images
5 -Google Scholar
6 -Handbook of Mineralogy (MinSocAm)
7 -Handbook of Mineralogy (UofA)
8 -MinDAT
9 -MinMax(Deutsch)
10 -MinMax(English)
11 -Mineralienatlas (Deutsch)
12 -QUT Mineral Atlas
13 - WWW-MINCRYST
14 -École des Mines de Paris
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Janhaugite
(Na,Ca)3(Mn++,Fe++)3(Ti++++,Zr,Nb)2Si4O15(OH,F,O)3
Dana No: 56.2.4.10 Strunz No: VIII/C.11-12
Locality:
Notes:
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